Tsuidoku Daily Challenge #13

July 21, 2026 · one worldwide grid (UTC) · medium · digits × colors

9
7
4
2
1
5
8
9
8
1
4
5
7
7
4
5
3
9
1
3
5
4
2
6
8
3
7
4
6
4
9
5
3
1
3
7
6

Top 10 of the day

RankPlayerTimeErrors
#1waly7:210
#2Player9:570
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Tsuidoku is a free online color sudoku: every row, column and region holds the digits 1-9 AND all 9 colors, and each digit-color pair appears exactly once. The math behind it · Daily hub